In 1967 a couple of Harvard Scientists were on the verge of publishing a paper showing the ill effects of Sugar and Carbs on health, and instead, they were bribed to change the culprit from Sugar and Carbs to Fat.
This is likely the reason why obesity, heart attacks, and diabetes has been on a continuous rise ever since. Even though this was and is well documented, the money machine is still beating this corrupt drum.
Great Article on that goes into detail about one of the biggest scams of the century put together by NPR. Here is the article.